Brown sulfur dye.



' heated to 250 C.

' meta-toluylenediamin and 450 UNITED s'rn rns PATENT OFFlCE.

RICHARD GLEY; OF BERLIN, GERMANY, AND PAUL DIETEItLE, 0F LYON, FRANCE, ASSIGNORS T0 ACTIEN GESELLSCHAFT Fil'R ANILIN FABRIKATION, OF BERLIN,

Patented Sept. 14, 1909.

GERMANY.

BROWN SULFUR DYE.

934,302. Specification of Letters ratent.

No Drawing.

Application filed. Nlay 24, 1909. Serial No. 497,853.

Dyestuffs and Processes of Making Same,

of which the following is a specification.

Our present invention relates tothe manufacture of new sulfurized dyestuffs and is based on the following observation: If a mixture of.ortho-aminophenol with metatoluylenediamin is heated with sulfur, hydrogensulfid is evolved in great quant1 ties, valuable sulfurized dyestutfs bein obtained by the reaction. The tints pro need with these coloring matters are, generally speaking, brown shades; the tints obtained depend, among others, to a great extent upon the proportions of the ingredients, and more especially upon those of aminophenol in relation to the nieta-tolnylenediamin.

The following example will serve to illustrate our invention, the parts being by weight:

Example: parts of ortho-aminophenol are thoroughly mixed with 122 parts of parts of sulfur and the resulting mass 15 gradually The temperature having been maintained until the mass has become totally solid, the melt after cooling is ulverized and then introduced into about four times its weight of a concentratet'l aqueous solution of sodium sulfid (of strength) the temperature therewhile should be at 100-120. From the solution, after filtering when necessary, the dyestulf is precipitated by adding hydrochloric acid; it is drained,

washed with water and dried. The prodnot thus obtained produces on cotton without a mordant, from a bath containing an alkalisulfid and a suitable salt,brown shades of a remarkable fastness. This dyestutf when pl'ilverized forms a brown powder,

insoluble in alcohol and in concentrated sultwo molecular proportions of meta-toluyl-- furie acid; it easily dissolves in sodium- .sullid to a brownish-red solution.- The dyestuff is very sparingly soluble in water to an orange colored solution, difficultly soluble in soda-lye to an orange colored solution and very sparingly soluble 1n concentrated liquor annnoniae to a yellowish colored solution.

It is obvious to those skilled in the art that our present invention is not limited to .the foregoing example or to the details given therein. \Ye may state, for instance, that a dyestufl of a more olive-brown shade is obtained, if two molecular proportions of orthoaminophenol and one molecular proportion of meta-toluylenediamin are heated together with sulfur, the other conditions of the foregoing example being unchanged, where as the proportions of the ingredients in the foregoing example correspond with one' molecule of ortho-aminophenol and two molecules of meta-toluylenediamin. It follows therefrom that the proportions of the ortlio-aminophenol and the meta-toluylenediamin have a distinct influence upon the tints obtained according to the present invention. ()n the other hand everybody skilled in the art is aware, that the proportions of sulfur well as the temperature and duration of the heating have an influence upon the shades obtained with the products resulting from sulfurizing melts.

Having now described our invention and in what manner it may be performed, What we claim as new is,-

1. As new articles of manufacture the new sulfuriz'ed dyestuffs dyeing brown shades, which may be obtained by heating a mixture of ortho-aminophenol, meta-toluylenediamin and sulfur, which new dyestuffs when pulverized form dark powders, easily soluble in an alkali-Sulfid solution with a brownish-red color, very sparingly soluble in Water and concentrated liquor ammonize and diiticultly soluble in soda-lye to an orange solution, and which new coloring matters are insoluble in alcohol and concentrated sulfuric acid.

2. As a new article of manufacture the onediamin with sulfur, this new dyestutl' when pulverized forming a brown powder,

5 colored solution a in concentrated liquor i which is easily soluble in a sodiuln-sulfid solution to a brownish-red colored solution, very sparingly soluble in waterto an orange set our hands in presence of two subscribing witnesses.

- RICHARD GLEY.

ammoniae to a yellowish colored solution and 1 AUL DIETERLE' diflicultly soluble insoda-lye to an orange Witnesses as to the signature of Richard colored solution, and which new coloring Gley: matter is insoluble in alcohol and concentrated sulfuric acid, this new dyestulf dyeing cotton Without a mordant fromva dyebath, containing analkali-sulfid and a suitable Dieterle: salt, brown shades of remarkable fastness. THOS. N. BROWN,

In testimony whereof we have hereunto l MARIN VAOI-iON.

WOLDEMAR HAUPT, HENRY HASPER.

Witnesses as to the signature of Paula 

